CVE-2026-23511mediumCWE-204

CVE-2026-23511: medium-severity vulnerability in zitadel

ZITADEL has a user enumeration vulnerability in Login UIs

Published

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 5.3epss 0.4%
exploitation probability
0.4%top 67% of all CVEs
observed exploitation
nono source reports it
ZITADEL is an open source identity management platform. Prior to 4.9.1 and 3.4.6, a user enumeration vulnerability has been discovered in Zitadel's login interfaces. An unauthenticated attacker can exploit this flaw to confirm the existence of valid user accounts by iterating through usernames and userIDs. This vulnerability is fixed in 4.9.1 and 3.4.6.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Affected products
zitadel · zitadel
Related CVEs — zitadel

In the same product, most dangerous first.

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References
https://github.com/zitadel/zitadel/commit/b85ab69e4679b0268e2b0e9b4cd04e934af10dd2https://github.com/zitadel/zitadel/commit/c300d4cc6a2775ab17ddfe76492f24170f8b858dhttps://github.com/zitadel/zitadel/releases/tag/v3.4.6https://github.com/zitadel/zitadel/releases/tag/v4.9.1https://github.com/zitadel/zitadel/security/advisories/GHSA-pvm5-9frx-264r